20528515

素因数分解:

$5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{5381}}^1$

素因数の和:5502

約数の個数: 16

約数和(自身を含む): 28416960

約数和(自身を除く): 7888445

約数列:

[1, 5, 7, 35, 109, 545, 763, 3815, 5381, 26905, 37667, 188335, 586529, 2932645, 4105703, 20528515]

約数ペア:

[(1, 20528515), (5, 4105703), (7, 2932645), (35, 586529), (109, 188335), (545, 37667), (763, 26905), (3815, 5381)]